538443840 has 112 divisors (see below), whose sum is σ = 1865010240. Its totient is φ = 130529280.

The previous prime is 538443821. The next prime is 538443863. The reversal of 538443840 is 48344835.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14935 + ... + 36054.

Almost surely, 2^538443840 is an apocalyptic number.

It is an amenable number.

538443840 is an abundant number, since it is smaller than the sum of its proper divisors (1326566400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

538443840 is a wasteful number, since it uses less digits than its factorization.

538443840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51020 (or 51010 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

The square root of 538443840 is about 23204.3926875926. The cubic root of 538443840 is about 813.5422975275.

The spelling of 538443840 in words is "five hundred thirty-eight million, four hundred forty-three thousand, eight hundred forty".